UV STERILIZERS

Our UV sterilizers consist of a black plastic pipe with a single, long-life, ultraviolet (UV) lamp suspended in the center within a quartz glass sleeve. When pond water is pumped through the space between the quartz sleeve and the plastic pipe, the strong ultraviolet radiation emitted by the lamp effectively kills floating microorganisms, such as bacteria, viruses, molds, and algae by breaking down their DNA molecules. The process is environmentally safe and does not leave any residue in the water.

We recommend routine use of UV sterilizers for koi ponds and other ponds with substantial fish populations to help control algae growth and control the spread of disease. They are also effective for eliminating green water in any pond where other methods have proven unsuccessful. Although UV sterilizers can be used without filtration in ponds with very little organic matter, when fish are present they should always be used in conjunction with biological filters that will remove suspended organic matter or toxic dissolved organic compounds. Since UV sterilizers add nothing to the water, they have no effect on string algae and other aquatic life that remain in the pond and do not pass by the UV lamp.

DESCRIPTION: Our UV's are made by industry pioneer Aqua Ultraviolet. Superior-quality, ultra-compact, high-output lamps keep the housing length as short as possible to minimize the likelihood of damage to the fragile glass lamps and sleeves during handling. Built-in wipers permit rapid cleaning of the exterior of the quartz tube without the need to open the unit, further reducing the risk of glass breakage.

uv sterilizer showing operation
of knob to activate internal wiper

SIZING: Performance of single and paired UV sterilizers with light, normal, and heavy fish stocking levels can be found in the chart below. For optimal results, the total UV lamp wattage must be properly matched to the pond size, and the water must not pass through the UV sterilizer faster than the maximum flow rate. We stock five UV sterilizers with lamp wattages of 15 watts, 25 watts, 57 watts, 100 watts, and 200 watts. When two sterilizers of the same size are ganged together with an inlet and outlet tee so that half the water flows through each, the maximum flow rate and pond capacity are doubled.

UV STERILIZER SPECIFICATIONS
Type of UV	Max Flow	Few Fish	Some Fish	Many Fish	Length	Ports
15 watt	700 gph	1000 gal	500 gal	200 gal	23"	2"
25 watt	1200 gph	2500 gal	1200 gal	600 gal	26"	2"
57 watt	3200 gph	5000 gal	2500 gal	1200 gal	26"	2"
2 x 57 watt	6400 gph	10000 gal	5000 gal	2500 gal	26"	2"
100 watt	5400 gph	17000 gal	8500 gal	4300 gal	32"	3"
2 x 100 watt	10800 gph	34000 gal	17000 gal	8500 gal	32"	3"
200 watt	9200 gph	44000 gal	22000 gal	11000 gal	49"	3"
2 x 200 watt	18400 gph	88000 gal	44000 gal	22000 gal	49"	3"

INSTALLATION: It is preferable to install the UV between the filter and the pond so that water passes through the UV after passing through the filter. However, with gravity return filters such as waterfall filters and bogs, it is both necessary and satisfactory to locate the UV between the pump and filter. In either case, it is important to use unions at the inlet and outlet to make removal possible for servicing and winter storage. We can supply reducing fittings as needed to fit any size pipe or hose.

If possible, all pumped water should pass through the UV. However, there are many situations where a UV may be suitable for the volume of the pond, but the desired pump flow rate exceeds the maximum flow rate for the UV. The best solution is to use a larger UV (or two UV's), but a satisfactory and much less-expensive alternative is to divert some of the water around the UV with a three-way valve assembly. All the pond water will still pass through the UV several times each day.

MAINTENANCE: Every few weeks, operate the wiper mechanism several times to clean the surface of the quartz sleeve, and verify that the bulb is functioning from the glow through the clear end cap. A UV lamp can last for many years, but the UV radiation it emits drops significantly as it ages. In cold climates where the pond is only operated from spring to fall, the bulb should be replaced every two years; in warmer climates where the pond is operated year-round, it should be replaced every year. The quartz sleeve can last for many years if it is handled carefully, and the UV housing has a lifetime warranty. At the end of each season, remove the UV by separating the unions, clean it thoroughly, and store it where it won't freeze.

Aqua UV Sterilizer, 15 watt, black, with wiper, $188.00
Aqua UV Sterilizer, 25 watt, black, with wiper, $240.00
Aqua UV Sterilizer, 57 watt, black, with wiper, $364.00
Aqua UV Sterilizer, 100 watt, white, with wiper, $1092.00
Aqua UV Sterilizer, 200 watt, white, with wiper, $1872.00
Replacement Lamp for 15 watt Aqua UV, $40.00
Replacement Lamp for 25 watt Aqua UV, $44.00
Replacement Lamp for 57 watt Aqua UV, $56.00
Replacement Lamp for 100 watt Aqua UV, $248.00
Replacement Lamp for 200 watt Aqua UV, $492.00
Replacement Sleeve for 15 watt Aqua UV, $40.00
Replacement Sleeve for 25 watt Aqua UV, $40.00
Replacement Sleeve for 57 watt Aqua UV, $40.00
Replacement Sleeve for 100 watt Aqua UV, $72.00
Replacement Sleeve for 200 watt Aqua UV, $112.00